Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLI. No. 29. — March, 1906. 



CONTRIBUTIONS FROM THE JEFFERSON PHYSICAL LABORATORY, 

 HARVARD UNIVERSITY. 



ELECTRIC DISCHARGES. 



I. SLOW MOVING ELECTRICAL LUMINOUS EFFECTS. 

 II. MAGNETIC FIELD AND ELECTRIC DISCHARGES. 



By John Trowbridge. 



With Four Plates. 



